CN112437021B - Routing control method, device, routing equipment and storage medium - Google Patents
Routing control method, device, routing equipment and storage medium Download PDFInfo
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- CN112437021B CN112437021B CN202011372040.0A CN202011372040A CN112437021B CN 112437021 B CN112437021 B CN 112437021B CN 202011372040 A CN202011372040 A CN 202011372040A CN 112437021 B CN112437021 B CN 112437021B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2458—Modification of priorities while in transit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The present disclosure relates to the field of system on chip technologies, and in particular, to a method and an apparatus for controlling routing, a routing device, and a storage medium. The method comprises the following steps: receiving transmission request information of a second routing packet in the process of transmitting data of a first routing packet through a first output channel; when the transmission request information of the second routing packet meets a preset interruption condition, interrupting the transmission of the first routing packet, wherein the preset interruption condition comprises that an output channel requested by the second routing packet is the first output channel and the priority of the second routing packet is greater than that of the first routing packet; and transmitting the data of the second routing packet through the first output channel. The embodiment of the disclosure constructs a routing protocol with a priority order, ensures that a routing packet with a higher priority can obtain a lower routing delay, and ensures the reasonability of routing control and routing transmission efficiency of routing equipment of a network on chip.
Description
Technical Field
The present disclosure relates to the field of system on chip technologies, and in particular, to a method and an apparatus for controlling routing, a routing device, and a storage medium.
Background
With the development of integrated circuits, the number of computing units on a single chip has increased, and the conventional bus-based architecture has become a bottleneck in chip speed. Therefore, the concept of Network on Chip (NoC) is proposed by taking the idea of computer Network as a reference. For multi-core systems, the network on chip can significantly improve the performance of the communication.
The network on chip may have various topologies according to different composition modes of physical links. In the two-dimensional structure, a 2-Dimension Mesh (2D Mesh) is a common structure, and as shown in fig. 1, the two-dimensional network mainly has the advantages of simple structure, good expandability, easy implementation and analysis, and the like.
In the related art, a routing device in a network on chip processes a plurality of routing packets according to a receiving order of the plurality of routing packets. However, in actual use, the delay requirement of part of the routing packets may be strict, and the delay requirement of part of the routing packets is lower. A reasonable and effective routing control method has not been provided in the related art.
Disclosure of Invention
In view of this, the present disclosure provides a routing control method, an apparatus, a routing device, and a storage medium. The technical scheme comprises the following steps:
according to an aspect of the present disclosure, there is provided a routing control method, the method including:
receiving transmission request information of a second routing packet in the process of transmitting data of a first routing packet through a first output channel;
when the transmission request information of the second routing packet meets a preset interruption condition, interrupting the transmission of the first routing packet, wherein the preset interruption condition comprises that an output channel requested by the second routing packet is the first output channel and the priority of the second routing packet is greater than that of the first routing packet;
and transmitting the data of the second routing packet through the first output channel.
In a possible implementation manner, the receiving transmission request information of the second routing packet during the process of transmitting the data of the first routing packet through the first output channel includes:
and receiving a header packet of the second routing packet in the process of transmitting the data of the first routing packet through the first output channel, wherein the header packet comprises the priority and the routing information of the second routing packet.
In another possible implementation manner, the routing information includes at least one of a routing packet type, a destination address, a first data packet sequence number, a starting storage address, a data packet address storage manner, and a check bit;
the routing packet type is used for indicating the type of the second routing packet, the destination address is an absolute address or a relative address of a receiving end of the second routing packet, the first data packet sequence number is used for indicating the total number of data packets to be transmitted in the second routing packet, the starting storage address is a starting address stored in a memory of the receiving end by a data packet in the second routing packet, the data packet address storage mode is used for indicating the storage mode of the data packet in the second routing packet in the memory of the receiving end, and the check bit is used for indicating whether the data in the header packet is correct or not.
In another possible implementation manner, the transmitting data of the second routing packet through the first output channel includes:
and transmitting a data packet and a tail packet of the second routing packet through the first output channel, wherein the data packet comprises data of the second routing packet, and the tail packet is used for indicating the end of the transmission of the second routing packet.
In another possible implementation manner, the end packet includes the type of the routing packet and a second packet sequence number, and the second packet sequence number is used to indicate the number of data packets that have not been transmitted in the second routing packet.
In another possible implementation manner, after the transmitting the data packet and the end packet of the second routing packet through the first output channel, the method further includes:
and determining whether the second routing packet has a packet loss condition according to the magnitude relation between the number of the received data packets in the second routing packet and a sequence number difference value, wherein the sequence number difference value is a difference value between the sequence number of the first data packet and the sequence number of the second data packet.
In another possible implementation manner, the interrupting transmission of the first routing packet when the transmission request information of the second routing packet satisfies a preset interruption condition includes:
when the transmission request information of the second routing packet meets the preset interrupt condition, generating a pseudo-tail packet of the first routing packet, wherein a second data packet sequence number in the pseudo-tail packet is a difference value between the first data packet sequence number and the number of data packets transmitted in the first routing packet;
and sending a pseudo tail packet of the first routing packet, wherein the pseudo tail packet is used for indicating interruption of transmission of the first routing packet.
In another possible implementation manner, after generating the pseudo end packet of the first routing packet when the transmission request information of the second routing packet meets the preset interrupt condition, the method further includes:
generating a pseudo head packet of the first routing packet, wherein a first data packet sequence number in the pseudo head packet is a second data packet sequence number in the pseudo tail packet;
and caching the pseudo head packet of the first routing packet.
In another possible implementation manner, the method further includes:
and after the data transmission of the second routing packet is finished, continuously transmitting the data which is not transmitted in the first routing packet according to the pseudo head packet of the first routing packet.
In another possible implementation manner, the method is applied to a routing device of a network on chip, where the routing device is a routing device in any one node of the network on chip, and the node includes a processor core.
According to another aspect of the present disclosure, there is provided a route control device including:
a receiving module, configured to receive transmission request information of a second routing packet during a process of transmitting data of a first routing packet through a first output channel;
a processing module, configured to interrupt transmission of the first routing packet when transmission request information of the second routing packet meets a preset interrupt condition, where the preset interrupt condition includes that an output channel requested by the second routing packet is the first output channel and a priority of the second routing packet is greater than a priority of the first routing packet;
and the sending module is used for transmitting the data of the second routing packet through the first output channel.
According to another aspect of the present disclosure, there is provided a routing device including: a processor; a memory for storing processor-executable instructions;
wherein the processor is configured to:
receiving transmission request information of a second routing packet in the process of transmitting data of a first routing packet through a first output channel;
when the transmission request information of the second routing packet meets a preset interruption condition, interrupting the transmission of the first routing packet, wherein the preset interruption condition comprises that an output channel requested by the second routing packet is the first output channel and the priority of the second routing packet is greater than that of the first routing packet;
and transmitting the data of the second routing packet through the first output channel.
According to another aspect of the present disclosure, there is provided a non-transitory computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the above-described method.
The embodiment of the present disclosure provides a routing control method, which receives transmission request information of a second routing packet in a process of transmitting data of a first routing packet through a first output channel; when the transmission request information of the second routing packet meets a preset interruption condition, interrupting the transmission of the first routing packet, wherein the preset interruption condition comprises that an output channel requested by the second routing packet is a first output channel and the priority of the second routing packet is greater than that of the first routing packet; transmitting data of the second routing packet through the first output channel; constructing a routing protocol with a priority order, ensuring that a routing packet with higher priority can obtain lower routing delay, for example, when a group of routing packets are to be blocked because of busy paths, if the priority of the routing packet is higher than that of the routing packet being transmitted on an output channel, interrupting the transmission of the routing packet with lower priority, and starting to transmit the routing packet with higher priority, thereby ensuring the reasonability of routing control and routing transmission efficiency of a routing device of the network on chip.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a diagram showing a structure of a two-dimensional network in the related art;
fig. 2 shows a schematic structural diagram of a routing device according to an exemplary embodiment of the present disclosure;
fig. 3 is a flowchart illustrating a routing control method according to an exemplary embodiment of the present disclosure;
fig. 4 shows a flowchart of a routing control method provided by another exemplary embodiment of the present disclosure;
fig. 5 is a schematic diagram illustrating a principle involved in a routing control method according to an exemplary embodiment of the present disclosure;
fig. 6 shows a schematic structural diagram of a routing control device according to an exemplary embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.
In the related art, a routing device in a network on chip processes a plurality of routing packets according to a receiving order of the plurality of routing packets. The current routing protocol does not distinguish the priority of the routing packets, and all the routing packets have the same priority. However, in actual use, the delay requirement of part of the routing packets may be strict, and the delay requirement of part of the routing packets is lower. It is therefore necessary to establish an efficient routing protocol with priority order.
The embodiment of the disclosure constructs a routing protocol with a priority order, and ensures that a routing packet with a higher priority can obtain a lower routing delay, for example, when a group of routing packets are to be blocked because of a busy path, if the priority of the routing packet is higher than the priority of the routing packet being transmitted on an output channel, the transmission of the routing packet with the lower priority is interrupted, and then the routing packet with the higher priority is transmitted, so that the rationality and the routing transmission efficiency of routing control of a routing device of a network on chip are ensured.
Referring to fig. 2, a schematic structural diagram of a routing device according to an exemplary embodiment of the present disclosure is shown.
The routing device is a routing device in a network on chip, the routing device is a routing device in any node of the network on chip, and the node comprises a processor core.
The network on chip comprises a plurality of nodes, and each node comprises a routing device. The network on chip may have various topologies according to different composition modes of physical links. The embodiment of the present disclosure is described by taking the topology of the network on chip as a 2D Mesh as an example.
A routing device, also called a router, is a hardware device that connects two or more networks, functions as a gateway between the networks, and is a dedicated intelligent network device that reads and transmits an address in each packet.
The routing device comprises a processor 10, a memory 20 and a communication interface 30. Those skilled in the art will appreciate that the configuration shown in fig. 2 does not constitute a limitation of the routing device and may include more or fewer components than shown, or some components in combination, or a different arrangement of components. Wherein:
the processor 10 is a control center of the routing device, connects various parts of the entire routing device using various interfaces and lines, and performs various functions of the routing device and processes data by running or executing software programs and/or modules stored in the memory 20 and calling data stored in the memory 20, thereby performing overall control of the routing device. The processor 10 may be implemented by a CPU or a Graphics Processing Unit (GPU).
The memory 20 may be used to store software programs and modules. The processor 10 executes various functional applications and data processing by executing software programs and modules stored in the memory 20. The memory 20 may mainly include a program storage area and a data storage area, wherein the program storage area may store the receiving module 21, the processing module 22, the transmitting module 23, and the like; the storage data area may store data created according to the use of the routing device, and the like. The Memory 20 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk. Accordingly, the memory 20 may also include a memory controller to provide the processor 10 access to the memory 20.
Wherein, the processor 20 executes the following functions by operating the receiving module 21: receiving transmission request information of a second routing packet in the process of transmitting data of a first routing packet through a first output channel; processor 20 performs the following functions by executing processing module 22: when the transmission request information of the second routing packet meets a preset interruption condition, interrupting the transmission of the first routing packet, wherein the preset interruption condition comprises that an output channel requested by the second routing packet is a first output channel and the priority of the second routing packet is greater than that of the first routing packet; the processor 20 performs the following functions by executing the sending module 23: and transmitting the data of the second routing packet through the first output channel.
In the following, several exemplary embodiments are adopted to describe the image processing method provided by the embodiments of the present disclosure.
Referring to fig. 3, a flowchart of a routing control method according to an exemplary embodiment of the present disclosure is shown, where this embodiment is illustrated by using this method in the routing device shown in fig. 2. The method comprises the following steps.
After receiving the transmission request information of the first routing packet, the routing device transmits the data of the first routing packet through the first output channel, and receives the transmission request information of the second routing packet in the process of transmitting the first routing packet.
Optionally, the routing device is a routing device of a network on chip, and the routing device is a routing device in any one node of the network on chip, where the node includes a processor core.
The transmission request information of the first routing packet is used for indicating an output channel requested by the first routing packet and the priority of the first routing packet. The transmission request information of the second routing packet is used for indicating an output channel requested by the second routing packet and the priority of the second routing packet. Wherein the second routing packet is different from the first routing packet.
The routing equipment judges whether the transmission request information of the second routing packet meets a preset interrupt condition, wherein the preset interrupt condition comprises that an output channel requested by the second routing packet is a first output channel and the priority of the second routing packet is greater than that of the first routing packet.
And if the transmission request information of the second routing packet meets the preset interruption condition, interrupting the transmission of the first routing packet. And if the transmission request information of the second routing packet does not meet the preset interruption condition, maintaining the transmission of the data of the first routing packet. Optionally, the data of the second routing packet is buffered while maintaining transmission of the data of the first routing packet.
After the routing device interrupts the transmission of the first routing packet, the routing device starts to transmit the data of the second routing packet through the first output channel.
To sum up, the embodiments of the present disclosure provide a routing control method, in a process of transmitting data of a first routing packet through a first output channel, receiving transmission request information of a second routing packet; when the transmission request information of the second routing packet meets a preset interruption condition, interrupting the transmission of the first routing packet, wherein the preset interruption condition comprises that an output channel requested by the second routing packet is a first output channel and the priority of the second routing packet is greater than that of the first routing packet; transmitting data of the second routing packet through the first output channel; constructing a routing protocol with a priority order, ensuring that a routing packet with higher priority can obtain lower routing delay, for example, when a group of routing packets are to be blocked because of busy paths, if the priority of the routing packet is higher than that of the routing packet being transmitted on an output channel, interrupting the transmission of the routing packet with lower priority, and starting to transmit the routing packet with higher priority, thereby ensuring the reasonability of routing control and routing transmission efficiency of a routing device of the network on chip.
In the related art, header information including routing address information and data are generally packaged and then transmitted, and each transmitted data packet includes the header information, which results in low routing transmission efficiency.
That is, each data packet in the current routing transmission consists of a header and a data, however, in general, most routing information in the data packet sent by the same router is the same, so that the transmission of the routing information can be reduced to one time. The primary routing process provided by the embodiment of the present disclosure includes transmission of a header packet, a data packet, and a trailer packet, that is, a header packet is sent first, where the header packet includes routing address information; then sending a data packet, wherein the data packet does not contain routing address information any more, namely the routing address information in the data packet is reduced; and finally, transmitting a tail packet, wherein the tail packet is used for indicating that all data packets in the routing process are sent completely, and finishing the data transmission of the current route.
The head packet of each group of routing packets also needs to mark the priority of the routing packet, so as to process the routing packets with different priorities respectively.
A complete routing process is a process of transmitting a set of routing packets, which includes a header packet, a data packet and a trailer packet, wherein the data packet is one or more data packets.
In one possible implementation, the header packet includes at least one of a priority of the routing packet, a type of the routing packet, a destination address, a first data packet sequence number, a start storage address, a data packet address storage mode, and a check bit.
Illustratively, the header packet contains information as shown in table one.
Watch 1
| P | T | Dst | Rank | Addr | R | C |
Wherein, P is the priority of the routing packet. The priority of the routing packet is used to indicate the transmission order of the routing packet. The priority and the transmission sequence are in positive correlation, namely the higher the priority, the higher the transmission sequence.
T is a routing packet type, for example, the routing packet type includes one of a data configuration packet, a normal data packet, and a query packet. The embodiment of the present disclosure does not limit the dividing manner of the routing packet types.
Dst is the destination address, i.e. the absolute address or relative address of the receiving end of the routing packet. For a multi-dimensional structure, such as an array comprising a chip, each chip comprising several cores, the destination address is a multi-dimensional structure.
Rank is the first data packet sequence number and is used for indicating the total number of data packets to be transmitted in the routing packet.
Addr is an initial storage address, namely the initial address stored in the memory of the receiving end by the data packet in the routing packet.
And R is a data packet address storage mode and is used for indicating the storage mode of the data packet in the routing packet in the memory of the receiving end. Usually, different data packets are stored in the memory of the receiving end continuously according to addresses in a routing process, but there may be a certain rule. Illustratively, the data packet address storage mode is used to indicate that the routing address continues to be stored after the routing address jumps by a preset amount every time a preset number of data packets are stored in the memory of the receiving end. For example, the preset number is 5, that is, after each 5 data packets are received and stored, the routing address jumps by a certain amount and then continues to be stored, and the information can reserve flexibility for the actual routing application.
C is a check bit for indicating whether the data in the header packet is correct. Optionally, the check bit is used to indicate that the data in the header packet is correct when the check bit is the first value, and is used to indicate that the data in the header packet is erroneous when the check bit is a value other than the first value. The embodiment of the present disclosure does not limit the specific value of the first value.
In one possible implementation, none of the plurality of data packets in the routing packet contains routing address information. Each data packet includes data and may also include check bits.
Illustratively, the information contained in the data packet is shown in table two.
Watch two
| Data | C |
Wherein, Data is Data, and C is a check bit for indicating whether the Data in the Data packet is correct.
In one possible implementation, a trailer is used to indicate the end of the transmission of the routing packet. The tail packet comprises a routing packet type and a second data packet sequence number, and the second data packet sequence number is used for indicating the number of data packets which are not transmitted in the routing packet, so that the receiving end can conveniently check the integrity of the data. The tail packet may further include a check bit for indicating whether the data in the tail packet is correct.
Optionally, the check bit is used to indicate that the data in the data packet is correct when the check bit is the second value, and is used to indicate that the data in the data packet is erroneous when the check bit is a value other than the second value. The embodiment of the present disclosure does not limit the specific value of the second value.
Illustratively, the information contained in the trailer packet is shown in table three.
Watch III
| T | Rank | C |
Wherein, T is the type of the routing packet, and the types of the routing packets of the head packet and the tail packet in a group of routing packets are the same.
And Rank is a second data packet sequence number and is used for indicating the number of data packets which are not transmitted in the routing packet. Typically the second packet sequence number is zero.
And C is a check bit used for indicating whether the data in the tail packet is correct or not. Optionally, the check bit is used to indicate that the data in the tail packet is correct when the check bit is a third value, and is used to indicate that the data in the tail packet is incorrect when the check bit is a value other than the third value. The embodiment of the present disclosure does not limit the specific value of the third value.
To sum up, the embodiment of the present disclosure further provides an efficient routing transmission method, where a protocol of a header packet, a data packet, and a trailer packet is used to make the data packet no longer contain routing address information, reduce the routing address information in the data packet, and improve transmission efficiency; meanwhile, the routing protocol with the priority order is supported, and the interruption and continuous transmission of routing data transmission can be supported, so that the routing transmission effect is further ensured.
That is, based on the above routing protocol of the header packet + the data packet + the trailer packet, in a general case, a routing process should be that a sending end sequentially sends the header packet, the data packet, and the trailer packet, and then ends data transmission of the group of routing packets, and a receiving end determines by checking whether the number of received data packets is equal to a difference between a first data packet sequence number in the header packet and a second data packet sequence number in the trailer packet.
It should be noted that, in the embodiment of the present disclosure, a transmitting end is referred to as a transmitting-end routing device for short, and a receiving end is referred to as a receiving-end routing device for short.
However, when a route with a high priority interrupts a route with a low priority, special processing is required. Referring to fig. 4, a flowchart of a routing control method according to another exemplary embodiment of the present disclosure is shown, where this embodiment is illustrated by using this method in the routing device shown in fig. 2. The method comprises the following steps.
And receiving a head packet of a second routing packet in the process of transmitting the data of the first routing packet through the first output channel by the routing equipment.
Wherein the header packet includes the priority and routing information of the second routing packet. The priority of the second routing packet is used to indicate the transmission order of the second routing packet. The priority and the transmission sequence are in positive correlation, namely the higher the priority, the higher the transmission sequence.
Optionally, the routing information includes at least one of a routing packet type, a destination address, a first data packet sequence number, a start storage address, a data packet address storage mode, and a check bit. The routing packet type is used for indicating the type of the second routing packet, the destination address is an absolute address or a relative address of a receiving end of the second routing packet, the first data packet sequence number is used for indicating the total number of data packets to be transmitted in the second routing packet, the starting storage address is a starting address stored in a receiving end memory by the data packets in the second routing packet, the data packet address storage mode is used for indicating the storage mode of the data packets in the second routing packet in the receiving end memory, and the check bit is used for indicating whether the data in the header packet is correct or not.
It should be noted that, the description of the header of the second routing packet may be similar to the details described in the foregoing embodiment, and will not be described herein again.
The routing equipment judges whether the transmission request information of the second routing packet meets a preset interrupt condition, wherein the preset interrupt condition comprises that an output channel requested by the second routing packet is a first output channel and the priority of the second routing packet is greater than that of the first routing packet.
And if the transmission request information of the second routing packet meets the preset interrupt condition, generating and sending the pseudo tail packet of the first routing packet. And if the transmission request information of the second routing packet does not meet the preset interruption condition, maintaining the transmission of the data of the first routing packet. Optionally, the data of the second routing packet is buffered while maintaining transmission of the data of the first routing packet.
And when the transmission request information of the second routing packet meets a preset interrupt condition, determining a difference value between the sequence number of the first data packet and the number of the transmitted data packets in the first routing packet as the sequence number of the second data packet in the pseudo-tail packet, and generating and sending the pseudo-tail packet of the first routing packet.
The pseudo-tail packet of the first routing packet comprises a routing packet type and a second data packet sequence number, the routing packet type in the pseudo-tail packet is the same as the routing packet type in the head packet, and the second data packet sequence number in the pseudo-tail packet is a difference value between the first data packet sequence number and the number of data packets transmitted in the first routing packet. The dummy trailer packet is used to indicate an interruption of transmission of the first routing packet.
Correspondingly, the receiving end receives the pseudo tail packet of the first routing packet and determines to end the receiving of the data of the first routing packet.
After the routing device generates the pseudo-tail packet of the first routing packet, a pseudo-head packet of the first routing packet is generated, wherein a first data packet sequence number in the pseudo-head packet is a second data packet sequence number in the pseudo-tail packet, that is, the first data packet sequence number in the pseudo-head packet is a difference value between the first data packet sequence number and the number of data packets transmitted in the first routing packet.
The routing device stores the generated dummy head packet in the head of the buffer queue of the first routing packet, that is, the buffered first routing packet includes the dummy head packet, the remaining data packets which are not transmitted yet and the tail packet. And the second data packet sequence number of the tail packet in the first routing packet is zero.
And the routing equipment transmits the data packet and the tail packet of the second routing packet through the first output channel.
Wherein the data packet of the second routing packet includes data. The data packet of the second routing packet may further include a check bit indicating whether data in the data packet of the second routing packet is correct.
The tail packet comprises a routing packet type and a second data packet sequence number, and the second data packet sequence number is used for indicating the number of data packets which are not transmitted in the second routing packet.
It should be noted that, the description of the data packet and the end packet of the second routing packet may refer to the related details introduced in the foregoing embodiment, and is not repeated herein.
And when the routing equipment receives the tail packet, ending the routing transmission process of the second routing packet. After the routing equipment finishes the transmission of the second routing packet, determining whether the second routing packet has a packet loss condition according to the size relationship between the number of the data packets in the received second routing packet and the difference value of the sequence numbers, wherein the difference value of the sequence numbers is the difference value between the sequence number of the first data packet and the sequence number of the second data packet.
If the number of the data packets in the received second routing packet is equal to the sequence number difference, indicating that the second routing packet has no packet loss condition; and if the number of the data packets in the received second routing packet is not equal to the sequence number difference value, indicating that the second routing packet has a packet loss condition, and generating an error signal for processing by the controller. Wherein the sequence number difference value provided to the routing device or the controller is the difference value between the sequence number of the first data packet and the sequence number of the second data packet.
And after the data transmission of the second routing packet is finished, the routing equipment continuously transmits the data which is not transmitted in the first routing packet.
And after the data transmission of the second routing packet is finished, the routing equipment continues to transmit the data packet and the tail packet which are not transmitted in the first routing packet according to the cached pseudo head packet of the first routing packet.
In an illustrative example, if a high priority routing packet is about to break a low priority routing packet at an intermediate node a of a routing path, as shown in fig. 5, a routing device of the intermediate node a is transmitting a routing packet K1 with a priority of "1" through an output channel E, and at some point the routing device of the intermediate node a receives a header packet of a routing packet K2 input in the S direction, and finds that the routing packet K2 is about to apply for the output channel E and that the priority "2" of the routing packet K2 is higher than the priority "1" of the routing packet K1, in which case the transmission of data of the low priority routing packet K1 is interrupted, and the routing device of the intermediate node a generates a dummy tail packet according to the counted number of data packets already transmitted by the routing packet K1, and transmits the dummy tail packet, and ends the data transmission of the routing packet K1 in advance. Meanwhile, according to the head packet of the route packet K1 stored before, a pseudo head packet is generated for the route packet K1 with lower priority again, and the pseudo head packet is stored at the head of the buffer queue of the route packet K1, and then the data of the route packet K2 with higher priority is transmitted. When the data transmission of the higher priority routing packet K2 is finished, the routing process that was interrupted just now continues, i.e. the data of the remaining routing packet K1 that has not yet been transmitted are transmitted.
To sum up, the embodiments of the present disclosure provide a routing control method, which adds a priority order of routing packets to ensure that a high-priority routing packet preferentially passes through a blocking node. On the other hand, a protocol for interrupting and continuously transmitting routing packets is provided, and it is theoretically ensured that routing packets with high priority can interrupt routing packets with low priority. On the other hand, a routing protocol of a head packet, a data packet and a tail packet is provided, the routing protocol with the priority order and the characteristics of interruption and continuous transmission are supported, and the routing transmission efficiency is improved.
The following are embodiments of the apparatus of the embodiments of the present disclosure, and for portions of the embodiments of the apparatus not described in detail, reference may be made to technical details disclosed in the above-mentioned method embodiments.
Referring to fig. 6, a schematic structural diagram of a routing control apparatus according to an exemplary embodiment of the present disclosure is shown. The routing control means may be implemented as all or part of the routing device by software, hardware, or a combination of both. The device includes: a receiving module 610, a processing module 620, and a transmitting module 630.
A receiving module 610, configured to receive transmission request information of a second routing packet during a process of transmitting data of a first routing packet through a first output channel;
a processing module 620, configured to interrupt transmission of the first routing packet when transmission request information of the second routing packet meets a preset interrupt condition, where the preset interrupt condition includes that an output channel requested by the second routing packet is a first output channel and a priority of the second routing packet is greater than a priority of the first routing packet;
a sending module 630, configured to transmit the data of the second routing packet through the first output channel.
In a possible implementation manner, the receiving module 610 is further configured to:
and receiving a head packet of the second routing packet in the process of transmitting the data of the first routing packet through the first output channel, wherein the head packet comprises the priority and the routing information of the second routing packet.
In another possible implementation manner, the routing information includes at least one of a routing packet type, a destination address, a first data packet sequence number, a starting storage address, a data packet address storage manner, and a check bit;
the routing packet type is used for indicating the type of the second routing packet, the destination address is an absolute address or a relative address of a receiving end of the second routing packet, the first data packet sequence number is used for indicating the total number of data packets to be transmitted in the second routing packet, the starting storage address is a starting address stored in a receiving end memory by the data packets in the second routing packet, the data packet address storage mode is used for indicating the storage mode of the data packets in the second routing packet in the receiving end memory, and the check bit is used for indicating whether the data in the header packet is correct or not.
In another possible implementation manner, the sending module 630 is further configured to:
and transmitting a data packet and a tail packet of the second routing packet through the first output channel, wherein the data packet comprises data of the second routing packet, and the tail packet is used for indicating the end of the transmission of the second routing packet.
In another possible implementation manner, the end packet includes a routing packet type and a second packet sequence number, and the second packet sequence number is used to indicate the number of packets that have not been transmitted in the second routing packet.
In another possible implementation manner, the processing module 620 is further configured to:
and determining whether the second routing packet has a packet loss condition according to the magnitude relation between the number of the received data packets in the second routing packet and a sequence number difference value, wherein the sequence number difference value is a difference value between the sequence number of the first data packet and the sequence number of the second data packet.
In another possible implementation manner, the processing module 620 is further configured to:
when the transmission request information of the second routing packet meets a preset interrupt condition, generating a pseudo tail packet of the first routing packet, wherein the sequence number of a second data packet in the pseudo tail packet is a difference value between the sequence number of the first data packet and the number of data packets transmitted in the first routing packet;
and sending a pseudo tail packet of the first routing packet, wherein the pseudo tail packet is used for indicating interruption of transmission of the first routing packet.
In another possible implementation manner, the processing module 620 is further configured to:
generating a pseudo head packet of the first routing packet, wherein a first data packet sequence number in the pseudo head packet is a second data packet sequence number in the pseudo tail packet;
and caching the pseudo head packet of the first routing packet.
In another possible implementation manner, the sending module 630 is further configured to:
and after the data transmission of the second routing packet is finished, continuously transmitting the data which is not transmitted in the first routing packet according to the pseudo head packet of the first routing packet.
In another possible implementation manner, the apparatus is applied to a routing device of a network on chip, where the routing device is a routing device in any one node of the network on chip, and the node includes a processor core.
It should be noted that, when the apparatus provided in the foregoing embodiment implements the functions thereof, only the division of the above functional modules is illustrated, and in practical applications, the above functions may be distributed by different functional modules according to actual needs, that is, the content structure of the device is divided into different functional modules, so as to complete all or part of the functions described above.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
The embodiment of the present disclosure further provides a routing device, where a user device includes: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: the steps executed by the routing device in the above method embodiments are realized.
The disclosed embodiments also provide a non-transitory computer-readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the methods in the various method embodiments described above.
The present disclosure may be systems, methods, and/or computer program products. The computer program product may include a computer-readable storage medium having computer-readable program instructions embodied thereon for causing a processor to implement various aspects of the present disclosure.
The computer readable storage medium may be a tangible device that can hold and store the instructions for use by the instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a Static Random Access Memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, a mechanical coding device, such as punch cards or in-groove projection structures having instructions stored thereon, and any suitable combination of the foregoing. Computer-readable storage media as used herein is not to be construed as transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission medium (e.g., optical pulses through a fiber optic cable), or electrical signals transmitted through electrical wires.
The computer-readable program instructions described herein may be downloaded from a computer-readable storage medium to a respective computing/processing device, or to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. The network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in the respective computing/processing device.
The computer program instructions for carrying out operations of the present disclosure may be assembler instructions, Instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider). In some embodiments, the electronic circuitry that can execute the computer-readable program instructions implements aspects of the present disclosure by utilizing the state information of the computer-readable program instructions to personalize the electronic circuitry, such as a programmable logic circuit, a Field Programmable Gate Array (FPGA), or a Programmable Logic Array (PLA).
Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.
These computer-readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer-readable program instructions may also be stored in a computer-readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (12)
1. A method for route control, the method comprising:
receiving transmission request information of a second routing packet in the process of transmitting data of a first routing packet through a first output channel;
when the transmission request information of the second routing packet meets a preset interruption condition, interrupting the transmission of the first routing packet, wherein the preset interruption condition comprises that an output channel requested by the second routing packet is the first output channel and the priority of the second routing packet is greater than that of the first routing packet;
transmitting data of the second routing packet through the first output channel;
when the transmission request information of the second routing packet meets a preset interruption condition, interrupting the transmission of the first routing packet, including:
when the transmission request information of the second routing packet meets the preset interrupt condition, generating a pseudo-tail packet of the first routing packet, wherein a second data packet sequence number in the pseudo-tail packet is a difference value between a first data packet sequence number and the number of data packets transmitted in the first routing packet, and the first data packet sequence number is used for indicating the total number of the data packets to be transmitted in the second routing packet;
and sending a pseudo tail packet of the first routing packet, wherein the pseudo tail packet is used for indicating interruption of transmission of the first routing packet.
2. The method of claim 1, wherein receiving transmission request information of a second routing packet during transmission of data of a first routing packet through a first output channel comprises:
and receiving a header packet of the second routing packet in the process of transmitting the data of the first routing packet through the first output channel, wherein the header packet comprises the priority and the routing information of the second routing packet.
3. The method of claim 2, wherein the routing information comprises at least one of a routing packet type, a destination address, the first data packet sequence number, a starting storage address, a data packet address storage mode, and a check bit;
the type of the routing packet is used for indicating the type of the second routing packet, the destination address is an absolute address or a relative address of a receiving end of the second routing packet, the starting storage address is a starting address stored in a memory of the receiving end by a data packet in the second routing packet, the address storage mode of the data packet is used for indicating the storage mode of the data packet in the second routing packet in the memory of the receiving end, and the check bit is used for indicating whether the data in the header packet is correct or not.
4. The method of claim 1, wherein said transmitting data of said second routing packet over said first output channel comprises:
and transmitting a data packet and a tail packet of the second routing packet through the first output channel, wherein the data packet comprises data of the second routing packet, and the tail packet is used for indicating the end of the transmission of the second routing packet.
5. The method of claim 4, wherein the end packet comprises a routing packet type and a second packet sequence number, and wherein the second packet sequence number is used to indicate the number of packets that have not been transmitted in the second routing packet.
6. The method of claim 5, wherein after transmitting the data packet and the trailer packet of the second routing packet through the first output channel, further comprising:
and determining whether the second routing packet has a packet loss condition according to the magnitude relation between the number of the received data packets in the second routing packet and a sequence number difference value, wherein the sequence number difference value is a difference value between the sequence number of the first data packet and the sequence number of the second data packet.
7. The method according to claim 1, wherein after generating the pseudo end packet of the first routing packet when the transmission request information of the second routing packet satisfies the preset interrupt condition, the method further comprises:
generating a pseudo head packet of the first routing packet, wherein a first data packet sequence number in the pseudo head packet is a second data packet sequence number in the pseudo tail packet;
and caching the pseudo head packet of the first routing packet.
8. The method of claim 7, further comprising:
and after the data transmission of the second routing packet is finished, continuously transmitting the data which is not transmitted in the first routing packet according to the pseudo head packet of the first routing packet.
9. The method according to any of claims 1 to 8, wherein the method is applied to a routing device of a network on chip, wherein the routing device is a routing device in any node of the network on chip, and the node comprises a processor core.
10. A route control device, characterized in that the route control device comprises:
a receiving module, configured to receive transmission request information of a second routing packet during a process of transmitting data of a first routing packet through a first output channel;
a processing module, configured to interrupt transmission of the first routing packet when transmission request information of the second routing packet meets a preset interrupt condition, where the preset interrupt condition includes that an output channel requested by the second routing packet is the first output channel and a priority of the second routing packet is greater than a priority of the first routing packet;
a sending module, configured to transmit data of the second routing packet through the first output channel;
when the transmission request information of the second routing packet meets a preset interruption condition, interrupting the transmission of the first routing packet, including:
when the transmission request information of the second routing packet meets the preset interrupt condition, generating a pseudo-tail packet of the first routing packet, wherein a second data packet sequence number in the pseudo-tail packet is a difference value between a first data packet sequence number and the number of data packets transmitted in the first routing packet, and the first data packet sequence number is used for indicating the total number of the data packets to be transmitted in the second routing packet;
and sending a pseudo tail packet of the first routing packet, wherein the pseudo tail packet is used for indicating interruption of transmission of the first routing packet.
11. A routing device, characterized in that the routing device comprises: a processor; a memory for storing processor-executable instructions;
wherein the processor is configured to:
receiving transmission request information of a second routing packet in the process of transmitting data of a first routing packet through a first output channel;
when the transmission request information of the second routing packet meets a preset interruption condition, interrupting the transmission of the first routing packet, wherein the preset interruption condition comprises that an output channel requested by the second routing packet is the first output channel and the priority of the second routing packet is greater than that of the first routing packet;
transmitting data of the second routing packet through the first output channel;
when the transmission request information of the second routing packet meets a preset interruption condition, interrupting the transmission of the first routing packet, including:
when the transmission request information of the second routing packet meets the preset interrupt condition, generating a pseudo-tail packet of the first routing packet, wherein a second data packet sequence number in the pseudo-tail packet is a difference value between a first data packet sequence number and the number of data packets transmitted in the first routing packet, and the first data packet sequence number is used for indicating the total number of the data packets to be transmitted in the second routing packet;
and sending a pseudo tail packet of the first routing packet, wherein the pseudo tail packet is used for indicating interruption of transmission of the first routing packet.
12. A non-transitory computer readable storage medium having stored thereon computer program instructions, wherein the computer program instructions, when executed by a processor, implement the method of any one of claims 1 to 9.
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| CN202011372040.0A CN112437021B (en) | 2020-11-30 | 2020-11-30 | Routing control method, device, routing equipment and storage medium |
| PCT/CN2020/137435 WO2022110384A1 (en) | 2020-11-30 | 2020-12-18 | Routing control method and apparatus, and routing device and storage medium |
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| US7460509B2 (en) * | 2004-03-05 | 2008-12-02 | Motorola, Inc. | Method and apparatus for isochronous datagram delivery over contention-based data link |
| CN102158403B (en) * | 2011-03-24 | 2014-03-05 | 山东大学 | Efficient data stream transmission communication structure suitable for on chip network and operating method thereof |
| US9363174B2 (en) * | 2013-02-14 | 2016-06-07 | Unisys Corporation | Apparatus, method, and system for a destination cached routing protocol for mobile ad hoc networks |
| CN103986664B (en) * | 2014-05-15 | 2017-06-27 | 厦门大学 | A kind of mixing for network-on-chip interconnects Mesh topological structures and its routing algorithm |
| US9608935B2 (en) * | 2014-09-08 | 2017-03-28 | Qualcomm Technologies, Inc. | Tunneling within a network-on-chip topology |
| JPWO2017169948A1 (en) * | 2016-03-30 | 2019-02-07 | 日本電気株式会社 | Communication system, usable bandwidth estimation device, usable bandwidth estimation method, and recording medium storing usable bandwidth estimation program |
| CN109039949B (en) * | 2018-07-24 | 2021-11-09 | 合肥工业大学 | Dynamic wireless medium access control method based on priority in wireless network on chip |
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